|12 Months Ended|
Dec. 31, 2016
|Goodwill And Intangible Assets Disclosure [Abstract]|
3. Intangible assets
There were no impairments recorded related to these intangible assets as of December 31, 2016 and 2015. Amortization expense for intangible assets for the years ended December 31, 2016, 2015 and 2014 was $101, $86 and $150 respectively.
The following tables represent the changes in net carrying values of the intangibles as of the respective dates:
Annual estimated amortization expense for each of the succeeding fiscal years is as follows:
The entire disclosure for all or part of the information related to intangible assets.
Reference 1: http://www.xbrl.org/2003/role/presentationRef